Mud shoe for auto tires



-Nov. 10, 1931. J. N. OVERTOQM MUD SH OE FOR AUTO TIRES Filed April 4, 1930 3 Sheets-Sheet l Nov. 10, 1931. J. N. OVERTOOM MUD SHCIJE FOR AUTO TIRES Filed April 4, 1930 3 Sheets-$heet 2 Nov. 10, 1931. N, OVERTQQM 1,831,542

MUD SHOE FOR AUTO TIRES Filed April 4, 1930 3 Sheets-Sheet 3 the general contour of the outer portion of *ci'ent distance toallow the wings to clear it Patented Nov. 10, 1931' j I 1 31 4 UNITED 'ST'ATESPATENT OFFICE JOHN iv. OVERT'OOM, or HARVEY, rumors nun SHOE iron AUTO TIRES 7 Application filed April l, 1930. Serial No. 441,533. My'in vention relates to mud shoes'or blocks an automobile ar and having pressed outfor application to vehicle tires in order to wardly a'pair of rlbs Hand 12 adjacentuts enable them to obtain agood grip for tracopposite ends which ribs form the gripping tion purposes in softmaterial suchas mud lugs for gripplng into the soft mud or snow 5 or snow. to aid the tractive effort of the wheel. Inter- 55' The principal purpose of this invention is mediate the lugsll and '12, the shoe is cut to provide a device of this character having away along the line 13 so as to permit a pora plurality of lugs with means on the shoe tion of the t re to prOJectthrough the shoe. for preventing the space between the lugs The purpose of this cut-away portion becoming clogged or filled so as to reduce WlllCll is also shown in Figs. 5, 6; and 8-jat'13"r0 the effect of'the lugs in obtaining a grip in is to permit a portionof the flexible tire to the soft bearing surface. be exposed between the traction legs. This It is also a purpose of this invention to portion of the tire, being resilient and not I provide a novel means for attaching the shoe being rigid with the shoe, forms a very useful. l to a wheel which will enable it to be quickfunction in maintaining the shoe in proper "o5 1y placed thereon without the use of chains condition to perform most efficiently. The or looks and readily removed with a 1n1nisoft tire in passing. into and out of contact mum amount of trouble. with the bearing surface below is, due to the i I will describe my invention as applied to weight of the car, alternately compressed and wheels of the spoke type and the disk type expanded which has theeffect of loosening by reference to the accompanying drawings x'any mud or snow that may catch between'the whereinlugs 11 and"1.2. so as'to cause it to fall ofi be- Fig. 1 is a side view of the type employed fore the lugs again come intocontact with the on wheels of the spoke or artillery type; bearing surface thus leaving the space bev Fig. 2 is an end View of the same device; tween the lugs free of any caked mud or snow Fig. 3 is an enlarged detail view taken that would destroy the efiiciency of the lugs fromthe left of Fig. 2 showing the tightenfor tract-ive purpose. ing means for clamping the shoe upon th The manner of attaching the device shown wheel; V in Figs. 1 to 4 to the wheel consists in pro. Fig. 4 is an enlarged sectlon on the line viding at oppositesides' of the shoe pivoted 4-4 of Fig. 2; members 14 and 15, the member 14 consisting Fig. 5 is a side view of a disk wheel showof a metal strap curved as indicated in Fig. ing the application of my invention thereto; 2 so as toextend over the wheel rim between Fig. 6 is an enlarged side view of the mud 'thespokes. The end portion of the member shoe used for disk wheels; 14 is provided with a number of depressions $5 Fig. 7 is an enlarged longitudinal section such as indicated at 16 to receive acorreof the clamping member used on the shoe spending tooth on amember 1'7 for clamping shown in Fig. 6; the device to the wheel. The member15 is Fig. 8 is an end view of the shoe shown in bent upwardly and U-shaped as shown in Fig. 40 Fig. 6; 3 and has pivoted to the base 18 thereof the Fig. 9 is an enlarged detail of a portion of tightening member 19 which has a portion 20 V the locking mechanism; extending downwardly below its pivot point Fig. 10 is a section on the line 10-10 of and has a free end portion 21 extending up- Fig. 7; and wardly over the centerof' the shoe where it Fig. 11 is an enlarged section taken on the is bifurcated as at 22 so that, when the wing line 1111 of Fig. 8. nut 23' on bolt'24 which clamps the members Referring now in detail to the drawings, 14 and 17 together is turned with the wings the type of mudshoe shown in Figs. 1 to 4 Y in line withthe bifurcation 22, it permitsthe consists of a metallic portion 10 shaped to member 21 to pass down over thenut a sufiiwhen the nut is rotated a quarter turn further.

When the nut is rotated into this position as shown in Figs. 1 to 4, it is'obvious that the wings engaging the bifurcations 22 holds the tightening member 19 in position as shown in Fig. 2.

Member 17 has its lower end curved as shown at 25 so as to form a bearing for the free end of the eXtension2O of member 19, and it will readily be seen that the curledup end 26 of the portion 21 will press downwardly on the bearing 25 drawing it closerto the pivot of the member 15 and thus reduce the circumference of the clamp so as to cause it to grip the wheel rim.

Referring now to Figs. 5 to 11, in this form the shoe 10. again has the legs 11 and 12 preferably formed up from the metal in the same manner as the legs 11 and 12. and welded or otherwise secured to the lugs of a pair of upwardly projecting arms 2? and 28 adapted to engage one side of the disk wheel. The

clamping means for engaging the other side of the disk wheel consists of an arm 29 which is secured in a manner to permit its turning toward and away from the wheel to the shoe by means of the brackets 30 and 31 and the turning shaft 32.

Shaft 32 has a centrally twisted portion 33 engagin in a corresponding twisted aperture 3% slid endwise without beingpermitted toturn, the arm 29 must turn about thetwisted portion 33. Shaft 32 has a squared section 35 and means for drawing the free end portions of said members toward each other to grip the Wheel therebetWeen, said last named means comprising a bar slidably secured to saidportion, means connecting'said bar and one of said members for causing swinging movement of the member by sliding movement of said bar, and means for sliding said,

bar.

, In witness whereof, I hereunto subscribe my name this 13th day'of March, A. D. 1930.

. 7 JOHN N; OVERTOOM.

in the arm 29 so that, if the shaft 32 is y,

in lug 30 so as to prevent-its rotation,'and

lug 31 is interiorly screw-threaded as indicated at 36 to receive the exteriorly screw threaded driving member 37 which member may be rotated by means of the polygonal head 38 thereon to move the shaft 32 endwise in either direction to thus turn the arm 29 into and out of wheel clamping position. Shaft 32 has the shouldered portion at 39 hearing against the inner end of the member 37 so that, the minute this member is moved to the left as shown in Fig. 7, it will force shaft 32 to the left. This shaft also has the cylindrical portion 40 passing through the member 3'? so as to berotatable therein provided with a bearing cap 41 screw-threaded into its end and overlapping the nut pore tion 38 so that, if the member 37is rotated in a direction causingit to move to the right as shown in Fig. 7 it willbear against the member 41 and cause shaft 32 to also move to the right thereby swinging the arm 29 in the opposite direction.

This makes a very simple device. for application to an automobile wheel, and, as'will be readilyapparent, the type shown inFigs. 5 to 11 for disk wheels may readily be used on other types of wheels as well although primarily designed for the disk wheels. The i only tool necessary toapply the clampin 

